Video speeds up response in Sydney harbour tunnel

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A video smoke detection system has been installed to help provide a rapid response to fire in the Sydney Harbour Tunnel.

D-Tec’s VSD system has been retrofitted to 80 of the tunnel’s CCTV cameras. The system uses image-processing technology and detection algorithms to alert operators to the presence of smoke in the shortest possible time – critical in a confined tunnel environment. detector.

A series of controlled vehicle fires were created in conjunction with the Sydney Fire Brigade to test the tunnel exhaust system’s ability to remove smoke, and to test the activation of the point detectors and the capability of the deluge system to suppress a fire. The VSD system generated the first alarm within 14 seconds of visible smoke and prior to any visible flames. A further 30 alarms were generated during the remainder of the test burn.

The system is capable of providing real time images and has a storage capacity of up to 5000 watermarked bitmap images. For the Sydney Harbour Tunnel, the hardware transmits its alarm signals to a dedicated NFP2 Chubb fire panel. The panel then provides a visual and audible alarm in the tunnel control room, where it generates an interactive mimic panel, via a graphic interface package known as Digifire.

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